Which Exhaust Style is correct for a 365 Gt4 2+2?

Good day All,

I have been looking at exhaust options for my 365 and have come across two pictures of what the rear section of the exhaust looks like. The parts manual and the Ansa catalog I have show the rear section to be a canister with tips, whereas, the another Ansa catalog shows simply tips... My car's exhaust has been customized using glass packs and is no longer stock and thus I do not know what it should be. The rear sections show different Ansa part numbers, but the same Ferrari part numbers, which adds to the confusion. That being said, does anyone know which is correct or does it matter? My feeling is that Style 1 (just the tips) would be louder given the lack of a resonator on the tips.

Thanks in advance!

Cheers,

Sam

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Good day All,

I received word that the "Style 1" was used in the very early production run and then was switched to "Style 2". This makes sense, as the original parts manual (dated 2/1973) shows an image of "Style 2".

Cheers,

Sam

 

Good day Jacques,

Thanks for your post and the info!

I am going through the exhaust on my car and I am exploring my options. For sure the Centre sections will be removed and most likely I will place an x-pipe in their place and probably some cats as well. Up here there is no emission testing ... yet... however, adding the cats will help our air quality. The rear sections are the critical items. I did not realize that the original and/or OEM replacements were so heavy. I have found the rear sections, but because of their length and weight the shipping cost looks to be brutal. What I may do is make up a nice rear section replacement that looks OEM, as I can do this quickly and inexpensively.... if I do not like it, I can simply spend the $$$ and buy the OEM replacements... which, apparently, use poor quality/thin metal and so they wear out quickly.

Whatever I chose to do I will post up.

Cheers,

Sam

 

Good day Arvid,

I am unsure how the X-pipe will affect the sound... but I will certainly let you know. Interestingly, Caribou rebuilt a Daytona engine and added an X-pipe and apparently, the X-pipe added a notable performance increase. Exactly how much, etc is unknown... but since it is not too difficult to add and somewhat inexpensive I thought I would try it. With that said I will be taking some time to study the physics of it all so I can better understand the issues and what pitfalls may arise. Besides this will give me an excuse to try out some of my tech gear (spectrum analyzer, sound pressure meters, etc) on this

Thank you for your feedback on your system! Indeed, given the past threads, the consensus seems that the centre sections quiet the system too much. I wish I had a complete original system to try as then I would have a proper comparison. However, given the cost of an OEM Ansa system (about $5K) I think I will just continue the direction I am on.

Cheers,

Sam

 

Good day Simon,

Thank you for your info! This is very interesting and does confirm that Style 1 was used at some point. In fact, in my case, it would actually be easier for me to duplicate a Style 1 system. I already have the NOS Ansa (resonator) Tips and all I would need to do is add/create a centre section. I will have to think about which style would be better and/or which I would like best.

Thanks again for your post!

Cheers,

Sam

 

Bazinga!... Surprisingly it is also very, very good on gas too

Cheers,

Sam

 

Good day Patrick,

Excellent! Good to hear... well in a manner of speaking... Thank you for the info!

Cheers,

Sam

 

Good day Tim,

Thanks for the book info! I will see if I can find it and hopefully squeeze in some time to read it. For one reason or another my spare times seems to be less and less... argh!

Cheers,

Sam